Datasheet

TYPICAL CHARACTERISTICS
0 1 2 3 4 5 6 7
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
−40
_
C
+25
_
C
+85
_
C
+125
_
C
I
DD
(µA)
V
DD
(V)
100
10
1
0.1
0.01
0.001
0.0001 0.001 0.01 0.1
C
T
(
µ
F)
101
−40°C, +25°C, +125°C
RESET Timeout (sec)
10
8
6
4
2
0
10 30 50 70 90 110 130
Temperature (°C)
−50 −30 −10
−10
−8
−6
−4
−2
Normalized RESET Timeout Period (%)
100
10
1
0 5 10 15 20 30 35 4525
Overdrive (%V
IT
)
5040
Transient Duration below V
IT
(µs)
RESET OCCURS
ABOVE THE CURVE
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
V
OL
Low−Level RESET Voltage (V)
V
DD
= 1.8V
RESET
Current (mA)
1.0
0.8
0.6
0.4
0.2
0
10 30 50 70 90 110 130
Temperature (°C)
−50 −30 −10
−1.0
−0.8
−0.6
−0.4
−0.2
Normalized V
IT
(%)
TPS3808
SBVS050J – MAY 2004 – REVISED AUGUST 2008 .......................................................................................................................................................... www.ti.com
At T
J
= +25 ° C, V
DD
= 3.3V, R
LRESET
= 100k Ω , and C
LRESET
= 50pF, unless otherwise noted.
SUPPLY CURRENT RESET TIMEOUT PERIOD
vs vs
SUPPLY VOLTAGE C
T
Figure 3. Figure 4.
NORMALIZED RESET TIMEOUT PERIOD
vs MAXIMUM TRANSIENT DURATION AT SENSE
TEMPERATURE vs
(C
T
= OPEN, C
T
= V
DD
, C
T
= Any) SENSE THRESHOLD OVERDRIVE VOLTAGE
Figure 5. Figure 6.
NORMALIZED SENSE THRESHOLD VOLTAGE (V
IT
) LOW-LEVEL RESET VOLTAGE
vs vs
TEMPERATURE RESET CURRENT
Figure 7. Figure 8.
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